Headphone



FIG. 1 is a front, bottom, and right side perspective view of a headphone showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is another front, bottom, and right side perspective view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM The ornamental design for a headphone, as shown and described. 